16
2-54. Weather charts and photographs are
examples of materials transmitted by
1. aw telegraphy
2. FAX (facsimile)
3. landline teletypewriter
4. rttv (radio teletypewriter)
2-55. Which of the following facsimile
transceiver operations consists of
subdividing the picture in an orderly
manner and into a large number of
segments?
1. Scanning
2. Recording
3. Receiving
4. Transmitting
2-56. The scanning operation is accomplished
in the facsimile transmitter by a
1. scanning drum and a phototube
arrangement
2. scanning drum and aperture tube
3. spiral drum and amplifier
4. phototube amplifier
2-57. The purpose of the phototube in
facsimile equipment is to
1. illuminate a segment of the picture
2. produce the carrier signal for the
exciter lamp
3. maintain the output voltage at a
predetermined fixed value
4. transform varying amounts of light
into electrical signals
2-58. Which of the following means is used to
synchronize the receiving drum with the
transmitting drum in a radio facsimile
system?
1. The drums are mechanically linked
2. Each drum is started by an accurate
clock
3. Both drums are operated by
synchronous motors
4. Both drums are stepped around a
precise number of steps by a relay
2-59. In a facsimile system, which of the
following methods is used to accomplish
framing at the receiver unit?
1. A synchronous clutch mechanism is
actuated
2. A primary time/frequency standard is
switched in
3. A series of phasing pulses are
transmitted prior to image
transmission
4. A synchronous motor at both the
transmitter and receiver is engaged
2-60. Of the following terms, which one is
primarily concerned with compromising
emanations?
1. Tempest
2. Radiation hazard
3. Quality monitoring
4. Electromagnetic interference
2-61. Of the following fundamental
requirements of a military
communications system, which one, if
any, is most important?
1. Speed
2. Security
3. Reliability
4. None of the above
2-62. What one assumption may be made
regarding all military radio
transmissions?
1. They are secure
2. They have been encrypted
3. They have been decrypted
4. They have been intercepted
2-63. Scheduled maintenance in support of
QMCS is designed to alert you to which
of the following problems?
1. Safety hazards
2. Equipment failure
3. System degradation
4. Improper operating procedures
